Circular loom

Abstract

With the circular loom, a plurality of partial healds are arranged circularly around a main shaft of the loom, and each comprises a plurality of inner and outer yarn guiding eyes for the guidance of a part of the two systems of warp yarn distributed all around, and which are given a countercurrent up-and-down motion for the formation of the weaving or travelling shed by sequential means, which engage a plate cam on and revolving with said main shaft of the loom. The inner or outer yarn guiding eyes are connected together by band means, each of which is guided over upper or lower guide rollers. The sequential means comprise at least one two-armed control lever for the activation of the countercurrent up-and-down alternating motion on the yarn guiding eyes of each partial heald, the control lever being supported and turning on a fixed fulcrum, and being, with the end of one of its arms, in operative connection with a cam on the plate cam, and which is fastened with the end of its other arm to the inner strand of the band means of the respective partial heald. These measures permit the construction of a shaft driving device which is practically maintenance-free, of high operating frequency and functionally reliable.

What I claim is: 
     
       1. In a circular loom comprising: a plurality of partial healds arranged circularly around a main loom shaft, each of said healds comprising inner and outer yarn guiding eyes for the guidance of a part of two systems of warp yarn distributed all around said shaft; and sequencing means for imparting up-and-down motion for the formation of a travelling shed, said sequencing means including a plate cam on and revolving with said main shaft of the loom, said inner and outer yarn guiding eyes being connected together by band means, respectively guided over upper and lower guide rollers, the improvement wherein said sequencing means comprise: at least one two-armed control lever for effecting up-and-down alternating motion of the yarn guiding eyes of each said partial heald,   means forming a fixed fulcrum for said control lever,   a lever cam on said plate cam in operative connection with an end of one arm of said lever, and   means forming a pivot joint with an inner strand of said band means flexibly connected to the end of the other arm of the control lever and including a flat crossbar lying along an inner surface of the inner strand of the band means and with the joint projecting therethrough.     
     
     
       2. The circular loom as defined in claim 1, wherein: the operative connection between the end of the one arm of the control lever and the cam of the plate cam is formed by a form-closed forced control.   
     
     
       3. The circular loom as defined in claim 1, wherein: the control lever comprises at least one rolling-off sequential roller,   which rolls on the cam on the plate cam at the end of its arm that is in operative connection with the cam.   
     
     
       4. The circular loom as defined in claim 1, wherein: the control lever is a linear lever.   
     
     
       5. The circular loom as defined in claim 1, wherein: a connecting rod lever is disposed between the joint on the crossbar and the respective control lever arm.